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Q.

0.185 g of an iron wire containing 99.8% iron is dissolved in an acid to form ferrous ions. The solution requires 33 mL of K2Cr2O7 solution for complete reaction. The normality of the K2Cr2O7 solution is:

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a

0.02

b

0.05

c

0.10

d

0.20

answer is D.

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Detailed Solution

0.185×0.99856=33×N1000

 So, N= 0.10

Thus, the correct option is D.

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